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There would still be areas with anomolous isotope ratios for some products. But, if you are saying that no one could find evidence of a civilization that can magically or otherwise erase all evidence of its, existance, well, sure, that kind of civ wouldn't have any evidence.
Originally posted by superduperman
I've been thinking about this for a while. If a civilization reaches a point in their development where they make use of total convertion of matter, then it would be highly likely to assume that they would leave no evidence that they ever existed, unless of course they wished to be later discovered after their extinction. (its also possible that they never became extinct, and just left). This is because if a race could use total convertion of matter, then all materials that they ever use would be 100% recylable and 100% efficent. Which means anything that they don't convert into something else would be biodegradable, and thus we would never find evidence of it
its a possible explanaition of atlantis.
Also something my mom always considered mentioned in the bible (which she thinks was a weapon) there was this great crystal maybe the use of this weapon sank atlantis.
Originally posted by hooligan13
We are a fairly advanced society and the buildings we put up today are not designed to last forever. maybe a few decades, but that's it. When a group of people become "advanced" they really only change their survival rate. Developements in medicine, tool craft, weaponry, all that stuff is designed to aid (to the point of replacement in some cases), our original hunt and gather instinct . As a group becomes more assured of it's survival the next highest prioritized drive becomes most important. In our case it would be procreation. This new agenda would spark a population explosion that would require city planners ( or whatever they were called ) to divert the massive workforce needed for building huge monuments to projects catering to an expanding population. I dunno - it's just a thought.
Originally posted by dr_strangecraft
Picture a near-extinction event. Say a mega-megaton detonation of Iran or N. Korea's experimental reactor, followed by a "china syndrome" where the radioactive core superheats and melts through the earth's crust down until it hits the water table. The following explosion blows radioactive water into the atmosphere, where jet streams carry the fallout globally.
Most wildlife and humans die. Picture, 10 years later, a global population of a million people. They survive by salvaging parts and weapons from the remains of our civilization. Their descendants could get by for several centuries by pulling down old utility lines for their copper, melting down old autos for steel, and burning asphalt for fuel. To survive, they scavenge, and thus systematically remove the most obvious evidence of their ancestors.